From cd34de10471a5ddad397739fae33555d47e53769 Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Mon, 10 Feb 2014 13:16:29 -0800 Subject: 3.4.y: timekeeping: fix 32-bit overflow in get_monotonic_boottime fixed upstream in v3.6 by ec145babe754f9ea1079034a108104b6001e001c get_monotonic_boottime adds three nanonsecond values stored in longs, followed by an s64. If the long values are all close to 1e9 the first three additions can overflow and become negative when added to the s64. Cast the first value to s64 so that all additions are 64 bit. Signed-off-by: Colin Cross [jstultz: Fished this out of the AOSP commong.git tree. This was fixed upstream in v3.6 by ec145babe754f9ea1079034a108104b6001e001c] Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- kernel/time/timekeeping.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 59b896621bfd..32f0cb8f1fe8 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1197,7 +1197,7 @@ void get_monotonic_boottime(struct timespec *ts) } while (read_seqretry(&timekeeper.lock, seq)); set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec, - ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs); + (s64)ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs); } EXPORT_SYMBOL_GPL(get_monotonic_boottime); -- cgit v1.2.3